Between 2009 and 2018, scientists conducted a national scale assessment of mercury accumulation in the National Park System using dragonfly larvae as biosentinels (species that accumulate a pollutant in their tissues as an index of exposure to other organisms without significant adverse effects to the biosentinel) through a citizen science network called the Dragonf
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Collecting larval fish for the Dragonfly Mercury Project
Between 2009 and 2018, scientists conducted a national scale assessment of mercury accumulation in the National Park System using dragonfly larvae as biosentinels (species that accumulate a pollutant in their tissues as an index of exposure to other organisms without significant adverse effects to the biosentinel) through a citizen science network called the Dragonf
Cover of California's Fourth Climate Change Assessment Report
Cover of the 2018 publication, "California’s Fourth Climate Change Assessment: Statewide Summary Report."
Cover of the 2018 publication, "California’s Fourth Climate Change Assessment: Statewide Summary Report."
Yellowstone National Park Dragonfly Mercury Project Sampling
This image shows citizen scientists along with National Park Service personnel identifying invertebrates as part of the Dragonfly Mercury Project.
This image shows citizen scientists along with National Park Service personnel identifying invertebrates as part of the Dragonfly Mercury Project.
Bair Island, Redwood City
After 100 years of restricted tidal activity to support agricultural use and salt harvesting, the tidal marshes around San Francisco Bay, like this one at Bair Island, are steadily rebuilding, returning to a stunning mosaic of marsh, mudflat, and channels.
After 100 years of restricted tidal activity to support agricultural use and salt harvesting, the tidal marshes around San Francisco Bay, like this one at Bair Island, are steadily rebuilding, returning to a stunning mosaic of marsh, mudflat, and channels.
Rocky Mountain NP Dragonfly Mercury Project sampling
Citizen scientists after a day of collecting dragonfly larvae for the Dragonfly Mercury Project.
Citizen scientists after a day of collecting dragonfly larvae for the Dragonfly Mercury Project.
Scientist Sitting Next to a Biological Safety Cabinet in a Laboratory
A U.S.
This is an example of a 72 hour post fertilization
This is an example of a 72 hour post fertilization fli1:egfp zebrafish (3 millimeters long) imaged under transmitted light. The same imaging system with was used.
This is an example of a 72 hour post fertilization fli1:egfp zebrafish (3 millimeters long) imaged under transmitted light. The same imaging system with was used.
High-Content Screening Laboratory -- Columbia, Missouri
High-Content Screening Laboratory -- Columbia, Missouri
High-Content Screening Laboratory -- Columbia, Missouri
Behavioral Toxicology Laboratory -- Columbia, Missouri
Behavioral Toxicology Laboratory -- Columbia, Missouri. Swimming paths of control (left) and copper (right) exposed fish
Behavioral Toxicology Laboratory -- Columbia, Missouri. Swimming paths of control (left) and copper (right) exposed fish
Swimming paths of control (left) and copper (right) exposed fish
Behavioral Toxicology Laboratory — Columbia, Missouri. Swimming paths of control (left) and copper (right) exposed fish demonstrate changes in swimming behavior detected following exposure to metals. Such changes can impact ability of fish to survive.
Behavioral Toxicology Laboratory — Columbia, Missouri. Swimming paths of control (left) and copper (right) exposed fish demonstrate changes in swimming behavior detected following exposure to metals. Such changes can impact ability of fish to survive.
Multimode, microplate reader used to measure optical density
Multimode, microplate reader
TZebrafish developmental cardiovascular toxicity high-content screen
The zebrafish developmental cardiovascular toxicity high-content screening assay uses a 384-well plate format to maximize number of treatments and replicates possible on each plate.
The zebrafish developmental cardiovascular toxicity high-content screening assay uses a 384-well plate format to maximize number of treatments and replicates possible on each plate.
Molecular Devices ImageXpress† High-Content Imaging System
High-Content Screening Laboratory — Columbia, Missouri. Molecular Devices ImageXpress† High-Content Imaging System
High-Content Screening Laboratory — Columbia, Missouri. Molecular Devices ImageXpress† High-Content Imaging System
Primary hepatocytes isolated from experimental smallmouth bass
Screen capture of primary hepatocytes isolated from experimental smallmouth bass (Micropterus dolomieu) visualized following image-based flow cytometric analysis
Screen capture of primary hepatocytes isolated from experimental smallmouth bass (Micropterus dolomieu) visualized following image-based flow cytometric analysis
USGS scientist preparing plates for yeast bioassay screening
USGS scientists working at laboratory fume hood
USGS scientists working at laboratory fume hood
Attribution of storm-weighted potential contaminant hazard ranks
Geospatial Analyses and Applications — Salt Lake City, Utah. Attribution of storm-weighted potential contaminant hazard ranks to sampling locations in the Sediment-Bound Contaminant Resiliency and Response (SCoRR) network.
Geospatial Analyses and Applications — Salt Lake City, Utah. Attribution of storm-weighted potential contaminant hazard ranks to sampling locations in the Sediment-Bound Contaminant Resiliency and Response (SCoRR) network.
USGS scientist examining human breast cancer cells under a microscope
USGS scientist examining human breast cancer cells under a microscope in the cell bioassay laboratory at Columbia Environmental Research Center. Behind the scientist is an automated liquid handling system for dispensing reagents into multi-well micropates for bioassay experiments.
USGS scientist examining human breast cancer cells under a microscope in the cell bioassay laboratory at Columbia Environmental Research Center. Behind the scientist is an automated liquid handling system for dispensing reagents into multi-well micropates for bioassay experiments.
Gas chromatograph-mass spectrometer (GCMS) used for pesticide analysis
Organic Chemistry Research Laboratory — Sacramento, California. Gas chromatograph-mass spectrometer - GCMS
Organic Chemistry Research Laboratory — Sacramento, California. Gas chromatograph-mass spectrometer - GCMS
Fathead minnows swimming in an experimental aquarium
Fathead minnows (Pimephales promelas) swimming in an expermental aquaium. The aquarium is part of an experiment to assess endocrine disruption in fish.
Fathead minnows (Pimephales promelas) swimming in an expermental aquaium. The aquarium is part of an experiment to assess endocrine disruption in fish.
Bioactive Chemicals Research Laboratory -- Boulder, Colorado
Bioactive Chemicals Research Laboratory -- Boulder, Colorado. Fathead minnows (Pimephales promelas) swimming in an expermental aquaium
Bioactive Chemicals Research Laboratory -- Boulder, Colorado. Fathead minnows (Pimephales promelas) swimming in an expermental aquaium
USGS scientist preparing to measure cyanotoxins in water samples
USGS) scientist preparing to measure cyanotoxins in water samples using an automated enzyme-linked immunosorbent assay (ELISA) instrument
USGS) scientist preparing to measure cyanotoxins in water samples using an automated enzyme-linked immunosorbent assay (ELISA) instrument